Danfoss

The invention relates to a controller (80) for a pump (42) with a variable pump capacity (PPC) in a pump unit (41). It has a sensor interface (81) for receiving internal signals (ITS) and a communication interface (82) for receiving the external signals (EXS) from a first fluid circuit (10) with further pump units (41a, 41b). It obtains an individual pressure increase (IPI) over the pump (42) with the internal signals (ITS). In a normal-mode operation, it controls the pump capacity (PPC) based on the external signals (EXS). It determines if the external signals (EXS) are received no longer and/or receives a failure-indication signal from the first fluid circuit (10), and then automatically switches to a failure-mode operation. It stores reference information (RFI) based at least on a part of the external signals (EXS) in the normal-mode operation in a memory (83) and controls, in the failure-mode operation, the pump capacity (PCC) based at least on the individual pressure increase (IPI) and the reference information (RFI); and/or it controls, in the failure-mode operation, the pump capacity (PPC) based at least on the individual pressure increase (IPI), on the pump capacity (PCC), and a failure-mode specific adaptation of a deadband (DB) for controlling the pump capacity (PCC). The invention also relates to a cooling distribution unit (30) with the controller (80), a data center cooling system (1) with the latter, and a method for controlling a pump (42).

The invention relates to a Gerotor-type fluid pump or Gerotor-type fluid motor (100) with a port plate segment (108). The port plate segment (108) comprises an inner recess (220) for a valve drive shaft (172) that is orbiting and rotating within the port plate segment (108). The port plate segment (108) further comprises a plurality of circumferentially arranged fluid throughput ports (136) for selectively fluidly connecting a valve spool segment (110) and a Gerotor-type fluid displacement segment (106) of the Gerotor-type fluid pump/Gerotor-type fluid motor (100). The inner recess (224) comprises at least two axially aligned segments (221, 222) with different diameters that are designed in an undetachable way.

The present disclosure provides a heat exchanger (100). The heat exchanger (100) includes: a manifold (1) having a manifold opening (11) passing through a pipe wall (10) of the manifold (1); a distribution pipe (2) disposed in the manifold (1) and having a distribution pipe opening (21) passing through a pipe wall (20) of the distribution pipe (2); and a connecting pipe assembly (3) including a first connecting pipe (31). The first connecting pipe (31) is inserted in the manifold opening (11), has an end connected to the distribution pipe (2) at the distribution pipe opening (21), and is in fluid communication with the distribution pipe (2). The distribution pipe (2) comprises a first distribution pipe section (25) and a second distribution pipe section (26) spaced apart from each other in an axial direction. The distribution pipe (2) further comprises a distribution pipe connecting section (27) connected between the first distribution pipe section (25) and the second distribution pipe section (26), and the distribution pipe opening (21) is formed in the distribution pipe connecting section (27).

The present invention relates to thrust pad (1) for a port plate (200) configured to be used with a pressure exchanger (1000), e.g. for a sea water reverse osmosis plant. The pressure exchanger (1000) includes a rotatable drum (1001), the port plate (200) with at least a first port orifice (201), and a port flange (100; 400) with at least a first fluid passage (101; 401). The thrust pad (1) is provided to improve a sealing concept of pressure exchangers. It comprises a plate-side surface (9), a flange-side surface (11), and a lateral surface (12). A curved shape of the thrust pad (1) is configured to be arranged at least partially between the port plate (200) and the port flange (100; 400). The thrust pad (1) extends in a thickness direction (Z) less than in a first direction (X) and a second direction (Y), wherein directions (X, Y, Z) are perpendicular. The thrust pad (1) comprises a through hole (2) that is configured to fluidically connect the first port orifice (201) of the port plate (200) to the first fluid passage (101; 401) of the port flange (100; 400). The present invention also relates to a port plate arrangement (250), an assembly of a port plate arrangement (250) and a port flange (100; 400) and to a pressure exchanger (1000).

The present invention relates to a thrust pad (1) for a port flange (101) of a hydraulic axial piston machine (1000). The thrust pad (1) is provided to improve a sealing concept of hydraulic axial piston machines. In this regard, the thrust pad (1) comprises a top surface (2), a lateral surface (3) and a bottom surface (4). Further, the thrust pad (1) comprises a curved shape configured to be arranged at least partially between the port flange (101) and a port plate (103) of the hydraulic axial piston machine (1000). The thrust pad (1) extends in a first direction (X), a second direction (Y) and a third direction (Z). The second direction (Y) is defined orthogonal with respect to the first direction (X) and the third direction (Z) is defined orthogonal with respect to the first direction (X) and the second direction (Y). Furthermore, the thrust pad (1) extends in the third direction (Z) less than in the first direction (X) and the second direction (Y), wherein the thrust pad (1) extends in the first direction (X) more than in the second direction (Y). The thrust pad (1) comprises a through hole (9), wherein the through hole (9) is configured to fluidically connect a first port (109) of the port flange (101) to a control hole (102) of the port plate (103). In addition, the present invention relates to a port flange, an assembly, and a hydraulic axial piston machine.

The invention relates to a fluid regulator valve comprising an inlet port and an outlet port for connecting the valve to a fluid system, a regulating mechanism for opening and closing a valve opening within an inner valve chamber between the inlet port and the outlet port, wherein the regulating mechanism comprises a diaphragm provided in a diaphragm chamber, a valve rod and a control element. According to the invention, a pressure balancing conduit with two conduit portions is provided between the diaphragm chamber and an outlet port surface of the outlet port, wherein the pressure balancing conduit comprises a chamber opening and a port opening, the two openings opening into the diaphragm chamber and the outlet port, respectively. The invention also relates to a refrigeration system with a fluid regulator valve.

The invention relates to a constant differential pressure valve arrangement (3). The housing (4) of the constant differential pressure valve arrangement (3) comprises a fluid transfer chamber (26) for the shutter member (27) of the constant differential pressure valve arrangement (3). A shielding wall member (39) is arranged between the fluid transfer chamber (26) and the shutter member (27). The shielding wall member (39) is designed and arranged in a way that it at least significantly reduces dynamic fluid flow forces in the gap (37) between the shielding wall member (39) and the shutter member (27).

The invention relates to a shutter arrangement for a constant differential pressure valve arrangement (3) that comprises a circumferentially designed shutter member (27) that is designed and arranged to be movable in an axial direction. A centrally arranged fluid flow guiding member (38) is fixedly arranged inside of the shutter arrangement.

The present invention relates to a compression ring (6) for a piston slipper arrangement (2), wherein the piston slipper arrangement (2) comprises a piston slipper body (3) and a ceramic sliding element (7) and is configured to be provided in an axial piston machine, wherein the compression ring (6) is configured to compress the ceramic sliding element (7). The objective of the present invention is to provide a compression ring (6) which allows an easy assembly of a piston slipper arrangement (2). This objective is solved by a compression ring (6) that comprises first engagement means (8) configured for engaging with corresponding second engagement means (9) of the piston slipper body (3) in order to limit rotation of the compression ring (6) relative to the piston slipper body (3). The invention further relates to a piston slipper arrangement and to an axial piston machine,

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